Earth Day is one of those "learning" opportunities that comes around once a year, and schools and educators are taking full advantage of it.
Toward that end, Maryland Public Television is airing a documentary, "Growing Greener Schools," at 4:30 p.m. Thursday (with a rebroadcast for early risers at 4 a.m. Friday). The show looks at how environmentally oriented curriculums and green buildings are changing students, families and communities.